The club is the most valuable sports team in the world, worth €3.24 billion ($3.65 billion) and the world's highest-earning football club for 2014–15, with an annual revenue of €577 million. The club is one of the most widely supported teams in the world.Real Madrid is one of three founding members of the Primera División that have never been relegated from the top division, along with Athletic Bilbao and Barcelona. The club holds many long-standing rivalries, most notably El Clásico with Barcelona and the El Derbi madrileño with Atlético Madrid.